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Current Datum Value: 3.63

Datums for 8441771, ESSEX, ESSEX RIVER MA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8441771, ESSEX, ESSEX RIVER, MA
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station: 8443970 Boston, MA
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW9.92Mean Higher-High Water
MHW9.50Mean High Water
MTL4.90Mean Tide Level
MSL5.08Mean Sea Level
DTL4.96Mean Diurnal Tide Level
MLW0.31Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-3.63Station Datum
GT9.92Great Diurnal Range
MN9.18Mean Range of Tide
DHQ0.43Mean Diurnal High Water Inequality
DLQ0.31Mean Diurnal Low Water Inequality
HWI3.95Greenwich High Water Interval (in hours)
LWI10.26Greenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
06/01/1994 - 09/30/1994




Products available at 8441771 ESSEX, ESSEX RIVER, MA

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services